Process for coking coal.



S. B. SHELBN.

PROCESS FOR COKING GOAL.

APPL

NATION PLED AUG. 5I 1908.

Patented. May 2 Urk S. B. SHELDON.

PRoGEss FOR 001mm com..

v APPLIGATON FILED AUG.45, 1908. @813m Patented May 24, 1910.

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39 Y l r l 9 3@ 35 3 A* 35 0 UV a@ municate with the passages 15, 16 and with the stack in the usual manner.

ln the operation of the apparatus described, assuming that the oven is being heated b v fuel burned in the passage 16 of the lett-hand .section of the oven, and by fuel burned in the passage 15 of the right-hand section ot' the oven, the valve for the left-hand section ot the oven will be opened,

lwhile that belonging to the right-hand section of the oven will be closed.v The products of combustion arising from the fuel burned in the passage 16 of the left-hand section of the oven, principally pass upwardly through the passages 18, 18 downwardly through the passages 17, and into the passages 15 from which they will pass out through one of the regenerators to the stack. A portion of said heated products of combustion will be diverted through the passage 2t) and openings 21, and thence through the passage-22 and pipe 24- to the chamber t3 surrounding the precoking passage.

When the right-hand section of the coking chamber is being heated by the combustion otl l'uel in the passage lt') thereof, which will take place at the time fuel is being burned in the passage 15 of the lefthand section of thc oven, the valve 23 which belongsl to `said right hand section otl the oven will be open, the valve 23 of the lelt` hand section then being closed, and the heated products olf combustion l'rom said right hand section ot' the oven will then be similarly conveyed through the passage 22 and pipe 24'to the chamber t.

lhe heated products ot combustion delivered to the chamber as above stated, serves to ell'ect the precoking or superticial coking ol' the coal in the precoking passage 11;, and at'ter said heated products ot' combustion have passed through said chamber t3 they are delivered through the pipe 1t) to the space surroumling the bin 8, to the walls of which heat is transmitted to the coal within said bin to a degree sullicient t0 heat the coal therein without coking it. -After circulating around the walls ot5 said bin S, said heated products of combustion make their exit. l'rom the top of the casing' t) to the stack l-l.

Fig. 2 indicates, in perspective view, an ()l,to llollman oven embracing two rows of coking chambers anti i'novided with feed openings llt), 30, through which fuel is introduced into the said coking chambers. Said cohing chambers in the two rows are shown as arranged end to end and in alinement with each other. Said Fig. 2 illustrates, in section taken through the wall between two adjacent coking chambers, the titles or passages in said wall. t aid passages include horizontal, upper passages 31, 31 corresponding with the passages 19, 19 shown in said Fig. 1. From said passages 31, 31 of each pair of coking chambers, vpassages 32, 32, formed upwardly to and discharge into a longitudinally arranged pipe 33' which extends lengthwise of the oven over the top of the same.

3st indicates, as a whole, a coal supply bin, having a plurality of bin compartments provided with a casing or jacket wliiclrform an inclosure surrounding said compartments.F with the bottom of said casing is connected the pipe 33 and the top of thesame is connected by an exit pipe with a stack 36. The bin compartments open at their lower ends into two discharge outs 37, 37 arranged in the same vertica plane with the rows of feed openings 30, 30 of-the oven.

Track rails 38, 38 are laid along the top wall of the oven at the sides of the feed openings, on which track rails run hopperbottom cars 39, 3%). Said cars are adapted to be moved alongl said rails, so as to bring them over either one of the feed openings and under the discharge sponts 37, 37.

In the operation of the oven thus constructed, heated products of combustion from Ithe heating t'lues of each of the coking ovens are diverted through the passages in the top wall of the oven, lead 32, 32 and, passing through the pipe 33, are

discharged into the jacket surrounding the bin compartments and serve to heat the coal therein in the same manner as hereinbefore described. Charges ofthe heated coal are delivered through the spouts 37, 37 to the cars 31), 39 and by the latter are transferred to the feed openings of those of the coking chambers which it may be desired atany time to till or charge with coal. The passages 32, 32 are controlled by valves, one of which is indi -ated by 40, so that connections between thc heating tlues of one or more of the coking chambers and the pipe 33 may be cut olf when desired. v Y

t2. vl2 indicate the two regenerators belonging to ach coking chamber.

ln carrying out my process by the use of the apparatus shown in Fig. 2, a portion of the. heated products of combustion from the llues of thev oven, after the passage of the same along or overthe walls of a. coking chamber or chamlars thereof, is conducted over the walls of the supply bin and utilized to ell'ect` preliminary heating of the coal in' said bin, without rotting of the Said coal.

When my invention is carried outy in connection with the operation of an Otto Hoffman or any other similar form of coke oven provided with regenerators, a portion of the products of combustion may be taken from the tlues of the oren at a point between the passages in which conlhustion of the fuel takes place and the regenerators Without requiring the burning ol. a greater amount of fuel than necessary to etl'ect the coking of the coal. This arises trom the well-known fact that, in coke oren practice, a consideralile percentage ot' waste heat is available in excess of that required to heat the maximum amount ot' regenerator space to the maximum tei'iiperature required and utilizable by the incoming air. 'This condition arises from the relative volume ot gas and air employed in the process and also from the fact that the gas is not regenerated. A certain amount ot' the heated products ot combustion may, therefore, be abstracted, after the through the main heating tlues and lietorc the same reach the regenerator on the way to the stack,4 without lessening the efficiency of the fuel in the colting operation. The ahstraeted portions of the products ot eoinhustion may be, therefort-i, utilized to ettect the preheating'ot the coal or to transi'nit. to the charges ot coal a non-eolting ',teat, hereinbefore set forth, without requiring the hui ning of any, or materially larger, amount ot fuel than if no portion of the products ot' combustion were so abstracted.

l claim as my invention l. The process of coking coal` which con` sists in introducing the coal into a supply bin, transferring the coal from said supply bin to a coking oven, conducting the heated products of combustion from burning fuel said products of combustion pass over the outer surface of the walls ot said Golfing chamber to effect` the coling of the coal therein, passing the airfed to the fuel through a regenerator .to heat the air, conducting through a regenerator a portion of the said heated products ot' combustion and transmitting to the, wallsl of the supply bin non-colting heat from another portion of said heated products ot combustion to effect preliminar)Y heatingof the coal.

2. The princess o't' coltingcoal, which consists in in't'rial'ucing coal into a supply hin, transferring the coal troni said supply hin to a pre-col ing iassage, advancing the coal through said pre-eoking passage into a cole ing chainher. (.toi'n'lucting the heated products ot eon'iluistion from burningl 'fuel over the outer surfaces of the wall of said colting ehainlier'to effect the colting of the coal therein. passing the air Yt'ed to the fuel through a regenerator to heat the air, conducting through a regenerator a portion ot the said heated products o't combustion, and applying eolting heat'to the coal in the I'uc-coking Jfurnace and non-colting heat to the coal in said supply hin, hy conducting into contact tirst with the walls ot' said pre- 4eolting passage and thereafter with the walls ot :iid supply hin another portion of said heated products ot combustion.

ln testimony, that l claim the foregoing as my invention l atl'x iny signature in the presence ot two witnesses, this 27th day of July A. l). 1908. l

SAM UICL B. SHELDUN. Vitnesses A. C, Brani, W. J. Ba rAN. 

